/*
 * Copyright (c) Huawei Technologies Co., Ltd. 2025. All rights reserved.
 * You can use this software according to the terms and conditions of the Mulan PSL v2.
 * You may obtain a copy of Mulan PSL v2 at:
 *          http://license.coscl.org.cn/MulanPSL2
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PSL v2 for more details.
 */
#include "CheckpointException.h"
#include <sstream>
namespace omnistream {
// Helper function to get reason message
    static std::string GetReasonMessage(CheckpointFailureReason reason)
    {
        // Implement mapping of reasons to messages
        switch (reason) {
            case CheckpointFailureReason::CHECKPOINT_DECLINED:
                return std::string("Checkpoint declined");
            case CheckpointFailureReason::CHECKPOINT_DECLINED_SUBSUMED:
                return std::string("Checkpoint was canceled "
                                   "because a barrier from newer checkpoint was received.");
            case CheckpointFailureReason::CHANNEL_STATE_SHARED_STREAM_EXCEPTION:
                return std::string("The checkpoint was aborted "
                                   "due to exception of other subtasks sharing the ChannelState file.");
            case CheckpointFailureReason::CHECKPOINT_DECLINED_ON_CANCELLATION_BARRIER:
                return std::string("Task received cancellation from one of its inputs");
                // ... other cases
            default:
                return "Unknown checkpoint failure";
        }
    }

    CheckpointException::CheckpointException(CheckpointFailureReason failureReason)
        : failureReason_(failureReason),
          message_(GetReasonMessage(failureReason)) {}

    CheckpointException::CheckpointException(CheckpointFailureReason failureReason, const std::exception &cause)
        : failureReason_(failureReason)
    {
        std::ostringstream oss;
        oss << GetReasonMessage(failureReason) << " Caused by: " << cause.what();
        message_ = oss.str();
    }

    CheckpointException::CheckpointException(const std::string &message,
                                             CheckpointFailureReason failureReason,
                                             const std::exception &cause)
        : failureReason_(failureReason)
    {
        std::ostringstream oss;
        oss << message << " Failure reason: " << GetReasonMessage(failureReason)
            << " Caused by: " << cause.what();
        message_ = oss.str();
    }

    CheckpointFailureReason CheckpointException::GetCheckpointFailureReason() const
    {
        return failureReason_;
    }
}